CH655419B - - Google Patents

Info

Publication number
CH655419B
CH655419B CH325380A CH325380A CH655419B CH 655419 B CH655419 B CH 655419B CH 325380 A CH325380 A CH 325380A CH 325380 A CH325380 A CH 325380A CH 655419 B CH655419 B CH 655419B
Authority
CH
Switzerland
Application number
CH325380A
Other languages
German (de)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of CH655419B publication Critical patent/CH655419B/de

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals
    • H04Q1/4575—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals which are transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Time-Division Multiplex Systems (AREA)
CH325380A 1979-04-27 1980-04-28 CH655419B (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7903346A NL7903346A (nl) 1979-04-27 1979-04-27 Digitaal signaleringsstelsel.

Publications (1)

Publication Number Publication Date
CH655419B true CH655419B (fi) 1986-04-15

Family

ID=19833070

Family Applications (1)

Application Number Title Priority Date Filing Date
CH325380A CH655419B (fi) 1979-04-27 1980-04-28

Country Status (13)

Country Link
US (1) US4355405A (fi)
JP (1) JPS55159688A (fi)
AR (1) AR228738A1 (fi)
AU (1) AU539806B2 (fi)
BE (1) BE882941A (fi)
BR (1) BR8002591A (fi)
CH (1) CH655419B (fi)
DE (1) DE3015567C2 (fi)
ES (1) ES8101290A1 (fi)
FR (1) FR2455405B1 (fi)
IT (1) IT1196912B (fi)
MX (1) MX149459A (fi)
NL (1) NL7903346A (fi)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2512306A1 (fr) * 1981-08-27 1983-03-04 Telecommunications Sa Dispositif numerique de reconnaissance de frequences
NL8200051A (nl) * 1982-01-08 1983-08-01 Philips Nv Inrichting en werkwijze voor het detecteren van multifrequentie tooncodesignalen.
NL8502008A (nl) * 1985-07-12 1987-02-02 Philips Nv Ontvanginrichting voor het onder bescherming van een stoorsignaal/spraaksignaalbewakingsfunctie herkennen van een aantal verschillende en voorafbepaalde frequentiecombinaties van toonfrequente signaleringscomponenten.
DD259987A3 (de) * 1986-07-07 1988-09-14 Rft Nachrichtenelektronik Albe Verfahren und anordnung zum sprachschutz in mfc-tastwahlempfaengern
US4845499A (en) * 1987-11-02 1989-07-04 Ag Communication Systems Corporation Method for generating PCM logarithmic values from linear values
GB2241853A (en) * 1990-03-08 1991-09-11 British Aerospace Digital signal processing apparatus comprising architectures for digital multiplexing and demultiplexing.
US5854813A (en) * 1994-12-29 1998-12-29 Motorola, Inc. Multiple access up converter/modulator and method
CA2181807C (en) * 1994-12-29 1999-09-28 Robert C. Elder Wideband frequency signal digitizer and method
US5754597A (en) * 1994-12-29 1998-05-19 Motorola, Inc. Method and apparatus for routing a digitized RF signal to a plurality of paths
US5602874A (en) * 1994-12-29 1997-02-11 Motorola, Inc. Method and apparatus for reducing quantization noise
US5668836A (en) * 1994-12-29 1997-09-16 Motorola, Inc. Split frequency band signal digitizer and method
US5748683A (en) * 1994-12-29 1998-05-05 Motorola, Inc. Multi-channel transceiver having an adaptive antenna array and method
US5579341A (en) * 1994-12-29 1996-11-26 Motorola, Inc. Multi-channel digital transceiver and method
US5710763A (en) * 1995-07-31 1998-01-20 Motorola, Inc. Filtered fast Fourier transmultiplexer and method
GB2330727B (en) * 1997-10-24 2002-10-09 Mitel Corp Tone and periodical signal detection
US7623826B2 (en) * 2004-07-22 2009-11-24 Frank Pergal Wireless repeater with arbitrary programmable selectivity
US10133549B1 (en) * 2017-12-04 2018-11-20 Kyocera Document Solutions Inc. Systems and methods for implementing a synchronous FIFO with registered outputs

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3150232A (en) * 1961-02-06 1964-09-22 Edward R Schmidt Variable damping circuits
US3436487A (en) * 1965-09-14 1969-04-01 Bell Telephone Labor Inc Telephone signaling arrangement
FR2141502B1 (fi) * 1971-06-01 1973-06-29 Ibm France
US3863030A (en) * 1972-06-01 1975-01-28 Gte Automatic Electric Lab Inc Pcm tone receiver using digital spectrum analysis
FR2191827A5 (fi) * 1972-06-27 1974-02-01 Socotel Mixte D Veloppem
US3824471A (en) * 1972-12-01 1974-07-16 Gte Automatic Electric Lab Inc Pcm tone receiver using floating-point digital spectrum analysis
NL7312548A (nl) * 1973-09-12 1975-03-14 Bell Telephone Mfg Multifrequent signaleringsstelsel.
FR2295665A1 (fr) * 1974-12-18 1976-07-16 Labo Cent Telecommunicat Recepteur numerique de signaux multifrequences
FR2299769A1 (fr) * 1975-01-31 1976-08-27 Telecommunications Sa Procede d'application
DE2553258C3 (de) * 1975-11-27 1980-07-03 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung für einen digitalen Mehrfrequenz-Zeichenempfänger
IT1072242B (it) * 1976-12-17 1985-04-10 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per il riconoscimento di segnali telefonici in codice multifrequenza convertiti in forma numerica

Also Published As

Publication number Publication date
AU539806B2 (en) 1984-10-18
FR2455405B1 (fr) 1987-08-07
ES490898A0 (es) 1980-12-01
IT8021664A0 (it) 1980-04-24
AR228738A1 (es) 1983-04-15
JPH0127640B2 (fi) 1989-05-30
BR8002591A (pt) 1980-12-09
US4355405A (en) 1982-10-19
IT1196912B (it) 1988-11-25
AU5767180A (en) 1980-10-30
FR2455405A1 (fr) 1980-11-21
MX149459A (es) 1983-11-08
DE3015567C2 (de) 1986-09-11
JPS55159688A (en) 1980-12-11
BE882941A (nl) 1980-10-24
DE3015567A1 (de) 1980-11-13
ES8101290A1 (es) 1980-12-01
NL7903346A (nl) 1980-10-29

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